800-150 Exam Dumps - Cisco Certified Field Technician (CCT) Questions and Answers

This content is aligned withIPv4 Addressing Fundamentals, detailed in the FLDTEC course underDevice Configuration and Verification:

Unicast: A unicast address uniquely identifies a single host on anetwork. This is the most common address type used for standard communication between two devices.

Broadcast: Broadcast addresses (e.g., 255.255.255.255 or subnet-specific broadcast) send traffic to all hosts in the network segment. Used for ARP requests and DHCP discovery.

Multicast: Used to deliver a packet to agroup of hostsinterested in the data, without flooding the network like a broadcast. Multicast uses addresses from the range224.0.0.0 to 239.255.255.255.

Loopback: The loopback address (127.0.0.1) is reserved for local testing, ensuring that the TCP/IP stack is working properly without needing to access the network.

Before installing or replacingDIMMs (Dual In-line Memory Modules)in a Cisco UCS server, it is essential to verify thecurrent DIMM configuration and the population order. Cisco UCS servers have strict memory population rules to ensure optimal performance and compatibility, particularly in relation to memory channels and banks.

While the type, capacity, and firmware compatibility are important, failing to follow the correct population guidelines can result in failed boot processes or suboptimal performance.

In the hierarchical network design model, theaccess layeris the first layer and serves as the entry point for end-user devices to connect to the network. This layer connects user devices such as PCs, IP phones, wireless access points, printers, and scanners to the network. It facilitates the initial connection between end-user devices and the network infrastructure. The access layer also enforces security policies and provides services such as VLAN membership, port security, and Quality of Service (QoS).​

Options A, C, and D refer to functions typically associated with the core or distribution layers, or with WAN connectivity, rather than the access layer.​

In a Cisco Nexus switch withdual power supplies, the recommended method is toconnect each power supply to a separate power source(Option C). This ensures power redundancy and fault tolerance.

If one power source fails (e.g., due to a power outage or circuit failure), the switch can continue operating uninterrupted using the second power source. Connecting both to a single source (Option D) defeats the purpose of redundancy.

TheWireless LAN Controller (WLC)plays a central role in Cisco’s Unified Wireless Network solution by providing centralized management, configuration, and monitoring for multiple access points (APs). It allows for streamlined policy enforcement, seamless mobility, load balancing, and security management across wireless networks.

While WLCs facilitate wireless connectivity indirectly, their main role is tocentrally manage and controlaccess points — not to function as Layer 3 routers or format data frames.

Inability to manage or control switch functions → Supervisor module

Failure to maintain optimal temperatures → Fan module

Loss of connectivity on specific ports → Line card

Inability to establish fiber optic connections → Transceivers

Degraded internal data transfer between line cards → Fabric module

From theFLDTEC training materials, Cisco MDS switches are built for high availability and redundancy, but field technicians must know which component impacts whatfunction:

Supervisor Module: Manages control plane functions — a failure results in loss of system-level management or redundancy.

Fan Module: Essential for cooling — failure here leads to overheating and thermal alarms.

Line Card: Provides connectivity — port failures or loss of interface status originate from faulty line cards.

Transceivers (SFP/QSFP modules): Responsible for optical transmission — failure leads to fiber optic link issues.

Fabric Module: Critical for switching between line cards — its failure leads to degraded or disrupted internal traffic paths.

These mappings help techniciansisolate the source of faultsand proceed with the correctRMA or replacementprocedure.

When configuring a terminal emulator (such as PuTTY, Tera Term, or HyperTerminal) to connect to the console port of a Cisco switch, the standard settings are as follows:​

Speed (baud rate): 9600This is the default transmission speed for Cisco console ports, ensuring compatibility across various devices.​

Data bits: 8This setting specifies that each character transmitted consists of 8 data bits, which is standard for most serial communications.​

Parity: NoneNo parity bit is used, meaning there is no additional error-checking bit appended to each character.​

Stop bits: 1One stop bit indicates the end of a character transmission.​

Flow control: NoneNo flow control is employed, allowing continuous data transmission without hardware or software-based pausing.​

Therefore, optionsC (Speed: 9600)andD (Data bits: 8)are correct. Options A (Stop bits: 2), B (Flow control: Hardware), and E (Parity: Even) deviate from the standard settings and may result in communication issues if configured.​

According toFLDTEC documentation and Cisco UCS architecture guides, each of these elements plays a distinct and essential role:

Fabric Interconnects (FI)– Act as the central switching and management point for the UCS domain, connecting servers to LAN and SAN.

Virtual Interface Cards (VICs)– Installed in servers, these adapters supportvirtualization of multiple NICs and HBAs, enabling dynamic profile assignment.

Fabric Extenders (FEXs)– Extend the I/O fabric from the FI to the chassis, reducing complexity and consolidating management.

Servers– Provide the actual compute resources and run workloads. These can bebladeorrack servershoused in the UCS chassis.

This structure is critical to theCisco Unified Fabric approach, which simplifies data center management through integration and automation.

The highlighted components in all three Cisco UCS server models (5108 B-Series Blade Server Chassis, X9508 X Series Modular Server Chassis, and C225 M6 Rack Server) are fan modules, which are field-replaceable units responsible for cooling the system.

The highlighted components in the images correspond tocooling fans— these are essential for maintaining optimal thermal conditions within each Cisco UCS server type.Here's a breakdown of what's visible in each:

Cisco UCS 5108 B-Series Blade Server Chassis: The highlighted vertical rectangular components arefan modules, which provide high-efficiency airflow for the densely packed blades.

Cisco UCS X9508 X-Series Modular Server Chassis: The front-facingfan traysare clearly marked, used to cool the modular nodes and shared infrastructure.

Cisco UCS C225 M6 Rack Server: The highlighted components on the side of the motherboard are alsofan modules, directly responsible for cooling the CPU, memory, and other internal components.

These fans arefield-replaceable units (FRUs)and are routinely accessed by technicians during preventive maintenance or fault replacement.

TheSpine-and-Leafarchitecture is the preferredpod-based deployment modelin modern data centers because of itshigh scalability and flexibility. In this topology:

Leaf switchesconnect to servers and act as the access layer.

Spine switchesfunction as the core layer, interconnecting all leaf switches.

This non-blocking, highly redundant model supportspredictable latency, easy horizontal scaling, and load balancing, making it ideal for cloud-scale and virtualized environments.

Top of Rack (ToR)andEnd of Row (EoR)are physical cabling layouts that do not inherently provide the same level of architectural scalability.

Fabric Extender modelsextend switch ports but depend on upstream switches for intelligence, limiting flexibility.